CBSE Class 12 Question Paper 2012 (Available): Check Previous Year Question Paper with Solution PDF (2023-2012)

CBSE CLASS XII 2012 Questions

• 1.

  Madhwan was appointed as a Human Resource Manager in ’Health Grow Ltd.’ six months back. As a Human Resource Manager, he has to perform many specialised activities and duties like analyzing jobs by collecting information about jobs and preparing job descriptions, training, and development of employees, etc. State three other specialized activities that Madhwan must perform in addition to the above as a Human Resource Manager of Health Grow Ltd.

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• 2.

  Figure shows variation of Coulomb force (F) acting between two point charges with \( \frac{1}{r^2} \), \( r \) being the separation between the two charges \( (q_1, q_2) \) and \( (q_2, q_3) \). If \( q_2 \) is positive and least in magnitude, then the magnitudes of \( q_1, q_2 \), and \( q_3 \) are such that:
  

  

  • \( q_2<q_1<q_3 \)
  • \( q_3<q_1<q_2 \)
  • \( q_1<q_2<q_3 \)
  • \( q_2<q_3<q_1 \)
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• 3.

  The resistance of a wire at 25°C is 10.0 \( \Omega \). When heated to 125°C, its resistance becomes 10.5 \( \Omega \). Find (i) the temperature coefficient of resistance of the wire, and (ii) the resistance of the wire at 425°C.

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• 4.

  Student to attempt either option-(A) or (B):
  (A) Write the features a molecule should have to act as a genetic material. In the light of the above features, evaluate and justify the suitability of the molecule that is preferred as an ideal genetic material. 
  OR 
  (B) Differentiate between the following:

  • [(i)] Polygenic Inheritance and Pleiotropy
  • [(ii)] Dominance, Codominance and Incomplete dominance

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• 5.

  A coin is tossed twice. Let $X$ be a random variable defined as the number of heads minus the number of tails. Obtain the probability distribution of $X$ and also find its mean.

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